Integrate `Fixnum` class into `Integer` class

* The `Fixnum` constant is now an alias for the `Integer` class.
* Remove `struct mrb_state::fixnum_class` member.
  If necessary, use `struct mrb_state::integer_class` instead.

1 files changed, 2 insertions, 2 deletions

diff --git a/mrbgems/mruby-random/test/random.rb b/mrbgems/mruby-random/test/random.rb
index cf4a55141..f3067748b 100644
--- a/mrbgems/mruby-random/test/random.rb
+++ b/mrbgems/mruby-random/test/random.rb
@@ -32,8 +32,8 @@ assert("Random.srand") do
 end
 
 assert("return class of Kernel.rand") do
-  assert_kind_of(Fixnum, rand(3))
-  assert_kind_of(Fixnum, rand(1.5))
+  assert_kind_of(Integer, rand(3))
+  assert_kind_of(Integer, rand(1.5))
   assert_kind_of(Float, rand)
   assert_kind_of(Float, rand(0.5))
 end